Pontoon type floating roof for liquid storage tank

摘要

A pontoon type floating roof for liquid storage tanks comprises a pontoon ring, an annular tension buffer assembly disposed concentric with respect to the pontoon ring, and a roof deck connected between the pontoon ring and side walls of the tension buffer assembly. The center part of the roof deck is located lower than the horizontal plane that includes the pontoon ring and the tension buffer assembly so that rainwater, oil, or the like accumulated on the roof drains away.